Users sharing access/accounts

I don't know if I put this in the right place or not but is there a way to prevent multiple users from sharing the same account?

I use Amember for a business application that can be sold to multiple employees of one organization but there is really nothing that would prevent a customer from buying one subscription and sharing it with multiple employees.

Are there any options here? I know another application I use has a verification process requiring a code to be sent to the email address on the account.

There is "Account Sharing Prevention" under the Login Page options of the admin panel. Setup/Configuration -> Login Page. This enables options to restrict users based on IP Address. Which may or may not work for restricting business clients. What your describing about requiring a code to be sent to the email address on the account - even less useful as they could all share the same email address.